Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a677343434220b9fe9d2b2e74961527c2ba06deb68470512992d5e3b165a820' 
  AND token = 'JUAZ1AQGzKumF80Nqaljz2WnVV5TdRPeGGR7Cn37Eq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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