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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d9f08ce8942c3d9e7c562165c7b162d7ed60a9437314f1a36d1d96d6673b3ed' 
  AND token = 'jiy/6Pd0+EqUtUXQJnH/Fhef5TAZbtQLtL8ITCgp7P8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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