Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a112ef32f69f87024c18a3f308a51acecc40452b04f146a69b2d725517556f6a' 
  AND token = '+MfN6z4QAnSCypsawD6wEiQ4P9IWrXfsECjMMRRFLXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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