Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd1ec9d5afd8c682960a985cedc88fc92d5991493ac7d0b38b3f40d7965f64b3b' 
  AND token = '9imgabjc4+EDAzSAtftyi2RcenPvRbt3nFVrZeH/0Xc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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