Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c08237369c6f0347a461b9adf6ba7e67a4477683efa91052a513688b1930f9aa' 
  AND token = 'PvBFb6NdiA5xUTjP3ZenGUw68cQVRHseLBMlIrgc3N4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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