Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9dce0fb81c84268bce1a000e0962f13893afc60fe0b9885b54bef9819685b54' 
  AND token = 'gwmSrlzmpbREdtb9z2nLxb8+vm418pIiEPsvm95kgx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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