Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bb4c027ed9ff4dad6422f8816b0c8d6a0b95d649594c4449002de3de91902b3' 
  AND token = 'NqnL4SjpNV3dv051Bd0xYfBk3Fb0yOuOkCll8+0ZWSk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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