Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe7dd1602d8ee250d54c1c270bdff07556ca43a71b098d21b2d530cdbc79f5aa' 
  AND token = 'o8sWX5o1BN6XaHSmXmEFXHCT0+3NlgjEWJyFbsVHA7w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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