Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c87d7b67939fe1ef3b3e7d163ad23437e7ba3c43a81af9ce4de39102fa8af75b' 
  AND token = 'VTl9KlXV4s6RoOaA7lyZjl7ICdGie0I5ExwlecV/lK8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}