SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '01f156c085f82f1630c6de7874dddd8ab095dcbbdba515ae8d33cb31354c0b0e' 
  AND token = 'FIM2VzWXJjLI9UsAPBCMKn5nkdVCwVctUZ+hYzR+oDU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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