Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ceb740202ee400e01956af85fc1ffda10a5ac2aa2a11f8a1ecdfb45986588fe5' 
  AND token = 'HnQdgGKAydJB6n0Faiqbg+wb5cih9jU2tzMQnE+W/SA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00074

JSON explain

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