Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e3d058ac4cced170c8dce7c27490038de184ec7a71cc279a99d8cc7692464c7b' 
  AND token = '4cPtDt018k8wHjM+bX8bdYo0nZQNwDYSr1TLsFalj/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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