Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0982eb7eb3447b2b79dfc0c7a34cdb9ed35ed0e29d2fdf9597430d3e65d6d524' 
  AND token = 'BlTWDl+fo6AfB40jZmzaJAB8vnQyIt+gwmFr+oavgCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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