Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75cc7e131f7a5c3df4ca5c00c1740a28f6778c5893e14764a693c7f4f6fc9a7c' 
  AND token = 's8O5EICH7zsEIbjuZjmxrU3C3tyeSFRPbZUyDcjg748=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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