Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59e44500cdeca4c2346659617163b5e8ca6620d54ad720baf216441c310e1e35' 
  AND token = 'piExTroJPHk/g+cvpglu6x0LYcTf3gamyUybJtTKo6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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