Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56471ec0ac95a4dcec3e4851cd7ca50003e69f26614138c0962233c3c2adee57' 
  AND token = 'xRNiFjvL3kuOyBVZ5kN31B+S2hrwvVquYrQ05j/qBko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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