Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59b5356d2fcc050c9937486c809a650dcc19a7034a31d6e30e2401494e924a64' 
  AND token = 'e06+PEcMnvxOBSk2hddZq6S1AdPYveSbDpZnb5rRbEg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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