Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9cf9173147033e69cb02c9e62480a501746acda72aa7cc8d64e7a60bbf45b3f0' 
  AND token = 'uMVFJ1ntaboz4inc/FfAj23uujeaPYU4mS8Wt4gRI/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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