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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ece2234590e1a06b6c3f23ac394a81230e38f48f0971634b452128c30e69f9f6' 
  AND token = 'fJGqKWf+I0NDKMgqk1Nq5rOqniaih9l4n0pJdXuQeYU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}