Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef2130cc000057efa29aa89f1e017c856f5b62e5d5c903b2c65b907696404d7f' 
  AND token = 'jgdlJ7e4ZbdUjnKsz/QILOfSnNSX0q3K/JR++ZF1jX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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