Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b5b9a58dbae68baa1c9ecff6463e0b5a9a2fcf6afad6603412615e3f1af1b6e' 
  AND token = 'MWjrS3IyBbFMd1+hJi50zkPYXGXLR/CBT/Ye3+tohSg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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