Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '315bcf93c1ffd9ce40bd44c0c911dbc9ba1b6587cd361ad696399b3aebcc449e' 
  AND token = 'clzI8cMfcWkEJPny3C/qK35dOnHQ4yziN/X6nqpKvTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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