SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95259488c1fd1a36be7e445ae13fa532153a7cc3f0627fba307ec95bc44571fa' 
  AND token = 'LCwBDapU/qbO/kJuQD5zGQwARMBFq/VXp0gnvNkQHK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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