Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '2b764983c53e56bdba411569fc33def4db1b07a0964f67cdd0e25bff1500c4ca' 
  AND token = 'QSE5868UQyjMwDDxuEhukhtv8l58WwjnvzFj6Z+R4oQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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