SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f79a7cba564a28b7863695c84a376c8fdb33e0b4df3f5bf4917cebfc531d1480' 
  AND token = 'L6sBMGF9IBcpwq0a8s0blazPHK6EnYwjxOumMAJCa0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00422

JSON explain

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