Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '539c432e24a9c4130c408455019d5c5ed8424657c495e2fed84954834fb8e122' 
  AND token = 'pJisRk5YpKEJ8fzk3buvsUCBF1kZMCdz9NzTBb2hnNg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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