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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd18abd3e9dc2a1cb093f8d9f5ffb1c7158260f05241e88362baa61a434f30978' 
  AND token = 'b9twuW7Ir7ZEJF+5NuoEnpsR/hfb8wPueFIIR9ZlsP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}