Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2102a1fbdef227e12534b8e95a395b461ffec8b58b1d2740dabb3255a0e8ea6a' 
  AND token = 'U4wAy6+uFbLiQJD2qquANXzcrXxO18K4EJlzlHfsaYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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