Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2171c2a94dae5e80e71a2e880bf325ab8106031d93a3fe4b26726ae0313ffe58' 
  AND token = 'nAnB9/fXs+ra5Um5/L0931BQjgkn2E+fVY2aj8fKMEg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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