Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '429c297170c45e5f49d2ce6eeaff8585e34dd69ac87ab184453d1e9d4c2c5f7c' 
  AND token = 'h0791Flm1IYFqghrNzP6oaqYYlx3wfZGiDRdiX5t0aE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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