Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4728f5a702473d1a1404228c508eaae5fd532dc407cd4db8d8b6ae21fc6f714' 
  AND token = 'dVHlT2APKcdS7HlHkaYZaTCPji+Tho4xnIPh7uXBuOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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