Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1634c3104988955bc0d3cfca094d96ff2cbb1499df20112f2b69ab4470a1b3c8' 
  AND token = 'SucGcYHFjF4+YF21iAhJIP+S0rL4b76gwpyJ6vIHn90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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