Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eade032341258108aa96fd4882b73c5cb97515c41481fae988a6ae778c8c9a15' 
  AND token = 'Id1lyzfa5MwdKYPbkztYFCdGvbOtMYWbFgrXX2KUHzs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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