Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2e132db74ef08c88a8568a02cc583f6d8b35aef64d105a4c2bfbef6fb9ddadf' 
  AND token = 'rkx4jcZG8rQCLiE2sBaJaNgCbMVE7OE01XX/L4xLJOY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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