Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc66b1268518d27260cff53c97e8de695014c0229df369ef99ee60977e446068' 
  AND token = 'cl7RwhDADh3wrRwJh2iWGHCZRqffk0CSeJQJCQ9DgCI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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