Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29cf34d69332bd14ea34e77574b75a0c2534be4c260f76a6710be8ae71d7fc6b' 
  AND token = 'ya3UBNCaqT5syW+n+VPb+FIRAwe7yRFK/2xdP2WVvI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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