SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '70567bfd4eaaab509e2d7c0f94c5465d21874f04f57660866bd98d8e05de59c6' 
  AND token = 'okgZEwYI+4J03hJlyha7Fp9C1o6uMUBtF5LNbZMGzuw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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