Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db0674d87d6510aa670872a3625b76f8dc4a35322573cc78c56a1a8270f26aa4' 
  AND token = 'pImmUtTXXtOpEud5vPTGXDWumov2ZTyRe62f1NV+lHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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