SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ab374449abf618fc0a0d0539f89f4e24cac101412697a94efda56cd0b8322f7' 
  AND token = 'UK+Fu7zCIjwFotEHs8ysmNHT7PzEjYBUKuQmiC+P8+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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