Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed96abc2830bf795e1ce18ebab640d2be35a018930c24a53eca5d443bd01b5dc' 
  AND token = 'T+o+C4Vi3sjp/iTEM2Orj13Kv990/1blLLENlGaeEsc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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