Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9d49b210dab71588461c235083dc1de61c49f2c1b43544ec8cf43f7d5d5ba22' 
  AND token = 'vIRHJTxNPBrnBFMg2KkN2zM3yAU786zOr7Eoo3W4vaw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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