Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd8fde8e7795c5ee8118eec66718d7253623abfa90c26e6ea705d8e09a3abfb62' 
  AND token = 'BY1CnZcQtwIfD+95fKfHLKhet4O+XrT8K6rfnnuirkY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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