Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35b7b9e5641216aeb3a7c010e7b4a663e5cf43c2f421c9c1a078c4ab81affec4' 
  AND token = 'rGPC637IYVsJP8oC9VHcNnaiibH9yt9iOfAFXAQvNeg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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