Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55c9b28a29f73ac9a5683446511fa24dcf78ba62a5b6eefd3a457deff091ebfa' 
  AND token = 'bBYtZiTFUALXpkRdoh+qC2ifZcMTgr8nkLiIRwnrmUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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