Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b648691ef13af63ed7862f4874e60e9115106822aa3afd53062b60862a05d0f4' 
  AND token = '+5yU3K0qTk/ypEbyI6weGPf6/MZLHPjS2zaYras+iyA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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