Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e55c7eeecaed6311fcddc708cb95f5ef92fae62bec0dc8c45b7cbf3f1e1864e' 
  AND token = '48Ha8lWShDXdnw2YFesLRF9r+priC/Jtz6PwLWTAY1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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