Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c94fa178d36619c771e742b9c292eaaf3b83a01da5a36565e7a88c6f68a68051' 
  AND token = 'f/LbMc/Ai1v+cm/4lge82DtDVpYTR+Tu91Quz664hT0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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