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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd1791d0779e73741fa529d88e549c1fd907ddafbee303eb40cf9569cc9acb167' 
  AND token = 'oYT3fehAdofY2wOx7I7GIjHUopVtZYOg2RX0IbvCE88=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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