Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1ce77d46aa801dbd0f298f86365b82ae9f2d562c9c98eedbee802a1314c8e1b' 
  AND token = 'LSf8v6cxMtJp0bd/MbCdEKOI4cCoE7KF3PDJZ+Oa8qE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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