Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39c712e21fecc5e941844d084b1d111c42b3efafd078521ede8a5877dc860e10' 
  AND token = 'vmEIuJyDdoi6yXBqpY+P1SdyXwXSZfKp1sw+aASofOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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