Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '537720619c7c78d350f1307cedee2a3755c1e2d0e8a1710c39299cd1fec87748' 
  AND token = 'rtUVDUMMlyI0jcZxiOwc2vEjfAgKb7Wxp7lAr4r8xuE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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