Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2ec284d02d22b9fe430ab34311496b85f9d39eb1620de0fc06934bb2b85f858' 
  AND token = 'O54ezRy8aojBa6BZujz6XKVAMrNvag0rvvzzGeREu8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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