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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c64bf55f558deef1e74f1f0e1e9aeadddaf9e9b5319908d868fdb451f9c63bc3' 
  AND token = 'hXRR2YWtYBaATnFC76RUKMNW2dsmr3Q+Fw4Y6sCsZ3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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