Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'becb429c7be03a33cf93662daefacbb1a9b1fcfb571516df780bca025328af89' 
  AND token = 'vnp+tfWieqnFGORb+DaEhRcFrTeuLlE+bQBatPM7Dxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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