Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd889b9a867487721ed8dd8c410b8128dc8cd1aa82e527c557878a798d2456f7d' 
  AND token = 'kFMlsRLS4Dk//QK9eTcUfzOfmGZlDyg7/0E1TPkNhPU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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