Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '90dee16cfc0fb19035aa2bbacc819207383b713bab9034c29198ad0f5afb01c3' 
  AND token = '0vHHpShyEDpjgzFzd8jYyvRNiUfjewS8egDPyXdnl9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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