Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f1a93eca3219d441a95e071ea30446f7c91cd25ccfa658fb16550eed98aeeb0' 
  AND token = 'RncgHDqUUZqaT3vK7qzXhvzfG6mBllCywrdiNcCFg34=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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