Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '120ecedab63675386d2ec50fadbe057969e6776c978fc02c69a33aa489389a25' 
  AND token = 'dG5G65QJoly9cWLm3HNJnSFRrfoksuk7AAaeZbV3SKo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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