SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8bda351d9f20610fb830e9ba36fdfbe3fb2f07194a171e90cd4238075e150e14' 
  AND token = 'bGmLKxg3CBt48V2uMwMaGsQQzF+H8KnObQ5EF1rj+OQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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