Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd046d58475bf0f48880ca2a9328caa1c3865f86b294ac6053c8d654d7dcfd7c' 
  AND token = '2xOOzbE0Hf59z/TtR7H4nt1VAUIm13bE6gVvjMlPq+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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