Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd77d1805a6d5214d2d0713c1be96cb2cecf546cd106c06aa1f588bc57d64e79' 
  AND token = '6rjisc+oTAsGqZg2ZFZrJy353CA+okjZdoxIc6w3rSs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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