Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a53c77d9989e392f5e22bdb6fc51190f4c10884a75b782b6b3b56bcc5510d19f' 
  AND token = 'Nz70MaXkeSRntPeE2os3g4+aPSxT7+5HjsdhTcQsByE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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