Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '702f2c3a58cc760795ea732ff224fadc0887cd50ac6fab2a0ae992f2bc08a474' 
  AND token = 'a1wfpjSOIX/0MK7WPSMVvxdPpe7neBGyeDKKrp2LLg8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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