Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b202e6e7dfdcb344845f5cc62c27987282e10459d425bca86b618eea5d591cd' 
  AND token = 'u35pgtVwiWF6wvpi8PnVqEKRsvF+pziiFiR/atZ9pcg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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